On condition that the front body shape of the projectile is unchangeable,a formula is obtained for determining the relation between the optimum boattail angle and the supersonic flight region.
在弹丸前体外形和外界大气密度不变
条件下，提
用弹丸炮口
赫数和顶点赫数确定旋转弹丸最佳尾
方法。
)尾
部On condition that the front body shape of the projectile is unchangeable,a formula is obtained for determining the relation between the optimum boattail angle and the supersonic flight region.
在弹丸前体外形和外界大气密度不变条件下，提用弹丸炮口赫数和顶点赫数确定旋转弹丸最佳尾方法。
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